Furnace.



J. H. PARSONS.

FURNACE.

APPLICATION FILED 00129, 1907. RENEWEDAUG. 16, 1913.

1,092,851 Patented Apr. 14, 1914.

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wit-"000w J. H. PARSONS.

FURNACE.

APPLICATION FILED 001.29, 1907. RENEWED AUG.16, 191s.

1,092,85 1 Patented Apr. 14, 1914.

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- ammo/44 606 witnesses COLUMBIA PLANOGRAPH CO-,\VASHINGTDN. n. c-

J. H. PARSONS.

FURNACE.

APPLICATION FILED 00129, 1901. RENEWED AUG. 16. 1913.

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Application filed October 29,1907, Serial No. 399,702. Renewed August16, 1913.

UNTTED ETATEEf FATE i erosion.

JOHN H. PARSONS, OF PHILADELPHIA,PENNSYLVANIA, ASSIGNOR '10 PARSONSENGINEERING COMPANY, OF -WILMINGl0N, DELAWARE, A CORPORATION OFDELAWARE.

To all whom it may concern Be it known that I, JOHN H. PARSONS, acitizen of the United States, residing at Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented.

certain new and useful Improvements in Furnaces, of which the followingis a specifi cation, reference being had therein to the ac companymgdrawing.

This inventlon relates to improvements in furnaces, and has for itsobject the provision injecting nozzle whereby to emit over the fuel bed,the said air, steam or both in the proper form and at the proper placeor places to insure the perfect combustion sought, without otherwiseimpairing the efti-l ciency of the furnace, as for lnstance, m-v pedingthe required draft for the burnlng' bed of fuel.

The invention also embraces a novel ar-i rangement of the attachmentwithin the fire box, and incidentally the special formation of theattachment enabling such arrangement, whereby the air, etc., passingthrough the at tachment will be readily heated to the desireddegree,preferably to the point of ignition when commingled with thegaseous products arising from the fuel,-before its discharge from thenozzle. i

The invention further includes the special formation of the attachmentwhereby the same may be interchangeable with the grate? bars of thefurnace. p

The invention still further includes a; novel coupling means whereby asteam or other jet nozzle may be connected to the receiving or inlet endof the attachment to create a forced suction or draft through theattachment in such instances as this may be found necessary orexpedient.

All of the foregoing characteristics of the Specification of LettersPatent.

FURNACE.

Patented Apr. 14, 1914.

' Serial No. 785,126.

present invention, and also other novel details in the construction andarrangement of parts will be fully understood from the detaileddescription hereinafter contained when read in connection with theaccompanying drawings forming part hereof and wherein one convenientembodiment of the invention is illustrated.

In the drawings: Figure 1 is a vertical longitudinal sectional view,parts being broken away, through a steam boiler furnace of ordinary typehaving the improvements applled to the fire-box thereof, Fig. 2 is avertlcal transverse sectional view on the line w-w of Fig. 1 lookingforwardly of the firebox, Fig. 3 is a perspective'view of one of theattachments removed from the fire-box. F g. 4 1s a transverse sectionalview through Fig. 3, and Fig. 5 is a view similar to Fig. 1

showing the invention applied to a steam locomotive.

Referring more specifically to the drawings wherein like referencecharacters refer to corresponding parts in the several views, Adesignates the fire-box of a steam boiler furnace. B being the bridgewall at the rear of the fire-box, C the combustion chamber or arm inrear of the fuel bed and above the bridge wall, D the water tubes, E thetop of the fire box,

H F the grate bars thereof, and G the furnace charge openings. Runningtransversely across the fire chamber in a plane near the bottom of theopenings G is a horizontal ledge H, and at the forward upper edge of thebridge wall B is a corresponding ledge I, while intermediate the two andmidway the fire chamber is a supporting bar J, said ledges and barcooperating to support the two series of grate bars F resting thereon,the ends of the grate bars being, as usual, removably inserted inopen-topped grooves or pockets 7' in the ledges I-I-and I andintermediate bar J.

Now "referring for the present especially to Fig. 3 wherein one of theattachments made in keeping with the invention is clearly shown, it willbe noted that said attachment comprises an elongated substantiallyhorizontally disposed pipe K, the upper surface thereof being roundedtransversely, while the under surface 7c of which is fiat. One end ofthis pipe K is formed into an elbow directed upwardly substantially at aright angle, as at L, and the other end is similarly formed into anelbow, directed downwardly and forwardly at an acute angle, as at M.Formed on the last mentioned elbow M 'is an outwardly projecting lug i,a corresponding lug h projecting outwardly from the elbow L. The pipejust described is preferably formed of iron. Removably placed upon theupper open end of the elbow L is an injecting nozzle N, preferablyformed of fire brick or iron having a shoulder n at its lower end toseat upon the surface of the end of the elbow L, and a collar or flangea depending over the outside of said elbow end to confine the nozzleagainst bodily movement laterally. The outlet or emitting end of thenozzle, is represented at O and is formed by flattening and turning theend of the nozzle inwardly, and inclining said end inwardly as best seenin Fig. 1., When the attachment as just defined, is placed in thefire-box of a furnace, it is simply necessary to remove one-or more ofthe grate bars F and insert the attachment in lieu thereof, the flatunder surface is permitting the same to lie flat upon the transverse barJ and the lugs z and h respectively, seating upon the ledges I and H, asis obvious. No other means is necessary to secure the attachment inplace nor to prevent disarrangement thereof when properly positioned inthe fire-box. I conveniently arrange one of these attachments near eachside wall of the fire-box and whereby the elbow M will project down intothe ash-pit m to receive air therefrom, said air being heated to a highdegree by its passage through the elongated pipe K embedded in theburning fuel bed, and the nozzles N being arranged whereby the heatedair emitted therefrom will be in the form of a sheet overhanging thefuel bed and moving in a plane rearwardly into the combustion area C andjust above or away from impact with the bridge wall B, whereby theproducts arising from the fuel must of necessity commingle with thehighly heated air and ignite when so commingled to secure the perfectcombustion sought. The inward inclination or 'beveling of the nozzlesdirects the sheets of air from the opposite corners of the fire-boxtoward each other to unite into a conjoint or'single sheet at the rearof the bed of fuel, and to some extent impact to spray in thecombustionarea to further the commingling process.

I have found that the arrangement set forth herein results in aconsiderable saving of fuel, more intense heat, the preservation and attimes increasing of draft through the fuel, greater steaming efiiciencyof the a boiler, and less damage to the boiler from fluctuations oftemperature in the furnace, also decreased labor on the part of theattendants. I

In. some instances, as for example, where plings S.

the draft through the furnace stack is not 7 suflicient to create theforced current of air through the pipe K and its nozzle N, it isdesirable to couple therewith a steam, compressed air or equivalent jetnozzle. Such a nozzle is represented at Q, at the end of a pipe Rleading from any suitable source of supply and is attached to the openend of the elbow M through the medium of a coupling S, the latter havingan annular flange or collar at one end formed to encompass said end ofthe elbow andbe clamped thereto by a bolt T, an open ended body portionU permitting 'the air to be sucked therethrough, and a ring V arrangedcentrally of said open end for the reception of the jet nozzle Q, abinding screw W being also employed in this instance and passed throughthe ring to clamp the nozzle in proper adjusted position. As a means forsecuring the attachments when used in series at proper predetermineddistances apart, I employ atie-rod Z extending across the ash-pit andengaging ears 2 on the con- In Fig. 5, the 1nve=ntion is shown as used 1in connection with a steam locomotive, the inlet ends M of the pipes Kbeing extended outwardly through the front wall of the fire-box to beexposed to the atmosphere whereby the travel of the engine will forcethe air through the pipes and nozzles N. The jet nozzle Q in thisembodiment of the invention is in communication with a valved connectionIt communicating with the steam dome of the locomotive. In thisparticular structure it will also be noted that the attachment isreadily applied to such fire boxes as employ transverse grate bars F,the flat bottoms 7c of the pipes K simply resting upon the uppersurfaces of said transverse grate bars. 1

In both of the embodiments of the invention described above, the nozzlesN and N being of flattened formation whereby to more readily form thesheets of air, the upper and lower walls thereof come relatively closetogether, and to prevent impairment thereof,as for instance by suchwalls collapsing or buckling together under intense heat,they arereinforced by a centrally disposed partition ordiaphragm 2 bridging thespace therebetween and extendingv not only through the flat end of thenozzle but also to a substantial extent down into the cvlindrical stemthereof,-note the dotted line in Fig. 3. These nozzles are convenientlyformed of fire-brick or similar substance capable of withstanding theheat.

Under some conditions of use it may be found desirable to securelyfasten the attachment in place, as by connecting the same to thecross-bar J, (Fig. 1) or one of the grate bars F. (Fig. 5), and for thispurpose I cast a pair of apertured lugs 3, 3, on the pipe spaced apartbolted thereto be- Where I refer to the attachment as beingself-supporting it is with the intention of defining a structure whichmay simply be placed in position within the fire chamber, and beingcapable of remaining in such placed position without the necessity ofsecuring devices or any special formation of or additions to theordinary fire-box.

Having thus described the invention What is claimed is 1. In combinationwith the fire box of a furnace and its grate structure, of an attachmentfor injecting air into the fire chamber above the fuel comprising anelongated imperforate heater adapted to occupy a position near the planeof the grate but extending upwardly above said plane so as to beembedded in the fuel, an upwardly conducting portion at the forward endof the heater terminating in a flat nozzle adapted to discharge air insheet formation rearwardly over the fuel, and an intake portionleadingto the other end of the heater, said heater being provided with a broadflat base portion adapted to engage the grate structure to support theattachment against lateral tilting movement and the upper portion of theheater being rounded to expose its sides to the fuel, substantially asdescribed.

2. In combination with the fire box of a furnace and its gratestructure, of an attachment for injecting air into the fire chamberabove the fuel comprising an elongated imperforate heater adapted tooccupy a position near the plane of the grate but extending upwardlyabove said plane so as to be embedded in the fuel, an upwardlyconducting portion at the forward end of the heater terminating in afiat nozzle adapted to discharge air in sheet formation rearwardly overthe fuel, and an intake portion leading to the other end of the heater,said heater being provided with depending lugs adapted to engage onopposite sides of the grate structure to maintain the displacement.

3. In combination with the fire box of a furnace and its gratestructure, of an attachment for injecting air into the fire chamberabove the fuel comprising an elongated heater adapted to occupy aposition near the plane of the grate but extending upwardly above saidplane so as to be embedded in the attachment against fuel, an upwardlyconducting portion at the forward end of the heater terminating in aflat nozzle adapted to discharge air in sheet formation rearwardly overthe fuel, and an intake portion offset in a downward direction from theheater to pass through the grate structure into the ash pit, saiddepending portion passing between the grate bars to prevent lateralmovement of the attachment.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN H. PARSONS.

Witnesses:

THos. R. HEATH, JAs. H. MILANs.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, .D. G.

